package reflect;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class Test07 {
    public static void test01(){
        User user = new User();
        long startTime=System.currentTimeMillis();
        for (int i = 0; i < 1000000000; i++) {
            user.getName();
        }
        long endTime=System.currentTimeMillis();
        System.out.println("普通方式调用10亿次"+(endTime-startTime)+"ms");
    }
    public static void test02() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
        User user = new User();
        Class c1=user.getClass();
        Method getName=c1.getDeclaredMethod("getName");
        long startTime=System.currentTimeMillis();
        for (int i = 0; i < 1000000000; i++) {
            getName.invoke(user,null);
        }
        long endTime=System.currentTimeMillis();
        System.out.println("反射方式调用10亿次"+(endTime-startTime)+"ms");
    }
    public static void test03() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
        User user = new User();
        Class c1=user.getClass();
        Method getName=c1.getDeclaredMethod("getName");
        getName.setAccessible(true);
        long startTime=System.currentTimeMillis();
        for (int i = 0; i < 1000000000; i++) {
            getName.invoke(user,null);
        }
        long endTime=System.currentTimeMillis();
        System.out.println("反射+关闭检测方式调用10亿次"+(endTime-startTime)+"ms");
    }

    public static void main(String[] args) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
        test01();
        test02();
        test03();
    }
}
